Rare, Unused Clear File Set - Tokyo Metropolitan Government Building - All 4 Colors - Governor Yuriko Koike

Offering a set of 4 clear files featuring the Tokyo Metropolitan Government Building, as seen on TV. (The design also includes the Sumitomo Building, Mitsui Building, Keio Plaza Hotel, and NS Building.)
This is a rare item purchased in 1994 from the Citizen Information Room, featuring the Metropolitan Government Building completed in 1991.
The original packaging bag from the Tokyo Welfare Corporation is also extremely rare.